모달창 닫기
- 홈으로 이동
1968년 ~ 2023년까지 1,187 건의 한국천문학회지를 격월간 확인하실 수 있습니다.
- The Korean Astronomical Society (The Korean Astronomical Society)
- 계간 (Quarterly)
- ISSN : 1225-4614 (ISSN : 1225-4614)
1225-4614
- DB구축현황 : 1,187건 (DB Construction : 1,187 Articles)
총 게시글 1,187건
페이지 79/119
781
- BABADZHANOV P. B.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.359-361
- 1996
- 원문 바로보기
782
- TOHMURA ICHIROH
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.321-322
- 1996
- 원문 바로보기
Using the data on the occurrences of the Ho: and soft X-ray flares for the time interval of January 1, 1986-May :31, 1994, we have studied the middle term(30-300days) pericities of the solar flare production during the activity cycle 22. Power analysis of the time seies of daily H<TEX>$\alpha$</TEX> flare index in the northern hemisphere shows prominent periodicities at 220, 120, 109, and 92 days(see Figures l(a) and l(b)), while in the southern hemisphere, those at 267, 213, 183, 167, and 107 days are apparent, though their peaks are not so distint as those in the northern hemisphere. Periodogram of daily soft X-ray flare index also reveal the periodicities at 279, 205, 164, 117, and 91 days in the northern hemisphere, and at 266, 220, 199, 162, 120, and 100 days in the southern hemisphere. Howeer, the 155-day periodicity reported for the earlier cycles, 19, 20, and 21, could not be confirmed in our analysis. to be submitted to Solar Physics; an extended abstract.
783
- LEE HYUNG MOK
- Journal of the Korean astronomical society = 천문학회지
- 29, n.2
- pp.195-205
- 1996
- 원문 바로보기
The evolution of the stellar debris after tidal disruption due to the super massive black hole's tidal force is difficult to solve numerically because of the large dynamical range of the problem. We developed an SPH (Smoothed Particle Hydrodynamics) - TVD (Total Variation Diminishing) hybrid code in which the SPH is used to cover a widely spread debris and the TVD is used to compute the stream collision more accurately. While the code in the present form is not sufficient to obtain desired resoultion, it could provide a useful tool in studying the aftermath of the stellar disruption by a massive black hole.
784
- HU HUI
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.255-256
- 1996
- 원문 바로보기
785
- FATEMI S. J.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.57-58
- 1996
- 원문 바로보기
There is an excess gamma flux from the general direction of the Galactic North Pole compared with that from the south when allowance is made for the contribution from CR interactions with the HI gas (Osborne et al., 1994). The extent to which it is in accord with the predictions of Wdowczyk and Wolfendale (1990 a,b) for gamma rays secondary to very high energy CR escaping from the VIRGO cluster is examined and it is claimed that the observations may well be of the order of those expected.
786
- LEE H. W.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.249-250
- 1996
- 원문 바로보기
787
- HIREMATH K. M.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.313-314
- 1996
- 원문 바로보기
Assuming that the solar activity and the solar cycle phenomena may be manifestations of global torsional MHD oscillations, we compute the Alfven wave travel times along the field lines in the five models of magnetic field described in the following text. For all these models, we compute standard deviation and it's ratio to mean Alfvenic wave travel times. The last two models yield the smallest relative bandwidth for the frequencies of the MHD oscillations. However, the last model is the only admissible one which can sustain global Alfvenic oscillations with well defined frequency for the fundamental mode
788
- TOVMASSIAN H. M.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.393-393
- 1996
- 원문 바로보기
A new concept of a simple and cheap construction of giant telescope is described.
789
- ZHANG X.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.199-200
- 1996
- 원문 바로보기
790
- YUN H. S.
- Journal of the Korean astronomical society = 천문학회지
- 29, n.suppl1
- pp.339-340
- 1996
- 원문 바로보기
In the present study we examine physical characteristics of a thin and rigid magnetic flux tube with a steady flow inside, which is embedded vertically upward in the solar atmosphere. We found from this study that (1) The downward material flow gives rise to a dominant heating in the flux tube which works with the conductive heating in the same direction. However, the upflow flow creates a dominant cooling which works against the conductive heating, resulting in a steeper temperature gradient with a shallower transition region. (2) Since the thickness of the transition region determines the material content in the transition region, a broader transition region of the downflow tube produces a larger differential measure.